{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/32092"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/32092","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Superconductor-insulator transition in quasi-one-dimensional nanowires","abstract":"We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the control parameter for this transition with the critical point occurring near the quantum of resistance for Cooper pairs. Wires in the superconducting phase of the SIT are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. No resistance “tails” characteristic of quantum phase slips were observed. Wires in the insulating phase of the SIT follow the predictions of the theory of weak Coulomb blockade in a diffusive normal metal. Longer wires display signs of a “mixed” behavior that is similar to that found for inhomogeneous wires in which a single wire acts as a combination of two or more superconducting and/or insulating sections.","abstract_html":"We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the control parameter for this transition with the critical point occurring near the quantum of resistance for Cooper pairs. Wires in the superconducting phase of the SIT are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. No resistance “tails” characteristic of quantum phase slips were observed. Wires in the insulating phase of the SIT follow the predictions of the theory of weak Coulomb blockade in a diffusive normal metal. Longer wires display signs of a “mixed” behavior that is similar to that found for inhomogeneous wires in which a single wire acts as a combination of two or more superconducting and/or insulating sections.","abstract_has_math":false,"creators":["Bollinger, Anthony Travis"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Bezryadin, Alexey"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-06-29T19:55:57Z","date_published":"2012-06-29T19:55:57Z","updated_at":"2026-07-22T22:25:30Z","subjects":["Molybdenum Germanium (MoGe)","superconducting nanowires","superconductor insulator transition","superconductivity","Langer, Ambegaokar, McCumber and Halperin (LAMH) theory"],"languages":["en"],"rights":["© 2005 Anthony Travis Bollinger"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["5187923"],"render_values":[{"text":"5187923","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/32092","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Bezryadin, Alexey"]},{"key":"dc:creator","label":"Author","values":["Bollinger, Anthony Travis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-06-29T19:55:57Z","10000-01-01","2005-10"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Molybdenum Germanium (MoGe)","superconducting nanowires","superconductor insulator transition","superconductivity","Langer, Ambegaokar, McCumber and Halperin (LAMH) theory"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["© 2005 Anthony Travis Bollinger"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["5187923","http://hdl.handle.net/2142/32092"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the control parameter for this transition with the critical point occurring near the quantum of resistance for Cooper pairs. Wires in the superconducting phase of the SIT are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. No resistance “tails” characteristic of quantum phase slips were observed. Wires in the insulating phase of the SIT follow the predictions of the theory of weak Coulomb blockade in a diffusive normal metal. Longer wires display signs of a “mixed” behavior that is similar to that found for inhomogeneous wires in which a single wire acts as a combination of two or more superconducting and/or insulating sections.","Submitted by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-06-29T19:55:57Z No. of bitstreams: 1 2005_Bollinger_Anthony.pdf: 20546805 bytes, checksum: 714603232a525be55df884ca057fd8c1 (MD5)","Made available in DSpace on 2012-06-29T19:55:57Z (GMT). No. of bitstreams: 1 2005_Bollinger_Anthony.pdf: 20546805 bytes, checksum: 714603232a525be55df884ca057fd8c1 (MD5) Previous issue date: 2005-10","Restriction data tranferred 2014-07-01T11:34:58-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: dissertation/thesis","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-06-29T19:55:57Z Item is restricted indefinitely.","dissertation/thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Superconductor-insulator transition in quasi-one-dimensional nanowires"]}]}],"canonical_facts":{"dc:contributor":["Bezryadin, Alexey"],"dc:creator":["Bollinger, Anthony Travis"],"dc:date":["2012-06-29T19:55:57Z","10000-01-01","2005-10"],"dc:description":["We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the control parameter for this transition with the critical point occurring near the quantum of resistance for Cooper pairs. Wires in the superconducting phase of the SIT are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. No resistance “tails” characteristic of quantum phase slips were observed. Wires in the insulating phase of the SIT follow the predictions of the theory of weak Coulomb blockade in a diffusive normal metal. Longer wires display signs of a “mixed” behavior that is similar to that found for inhomogeneous wires in which a single wire acts as a combination of two or more superconducting and/or insulating sections.","Submitted by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-06-29T19:55:57Z No. of bitstreams: 1 2005_Bollinger_Anthony.pdf: 20546805 bytes, checksum: 714603232a525be55df884ca057fd8c1 (MD5)","Made available in DSpace on 2012-06-29T19:55:57Z (GMT). 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